Yes, I think it gets upset by a link to the Alexa toolbar that I have somewhere on some unused page. Alexa isn't bad, but it does track your browsing in order to build it's database of web usage. Alexa is associated with Amazon.

I should probably remove the link. I used to use the Alexa toolbar and Alexa to look at traffic to this website, but I really don't pay attention to it anymore and I use my own stats and Google for traffic analysis.